# HOME CHALLENGE: 20 Easy Experiments in 5 mins for Bored Adults and Kids at School Inside | Summary and Q&A

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โข
March 20, 2020
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Physics Girl
HOME CHALLENGE: 20 Easy Experiments in 5 mins for Bored Adults and Kids at School Inside

## TL;DR

Dianna from Physics Girl challenges herself to complete 20 science experiments in 5 minutes using household items.

## Key Insights

• ๐งก Dianna showcases a range of science experiments that can be done at home using simple household items.
• ๐ฟ The experiments utilize principles such as static electricity, pressure, magnetism, inertia, surface tension, and optical properties.
• ๐ฆบ Safety precautions, such as adult supervision and safety goggles, are emphasized for certain experiments.
• ๐ซต The video encourages viewers to try the experiments themselves and share their attempts using the hashtag #stuckAtHomeScience.

## Transcript

• Hey, I'm Dianna. You're watching Physics Girl. I'm stuck inside, so I've challenged myself to do 20 experiments in five minutes. That's four experiments per minute, which works out to about 15 seconds per experiment. I have not been able to do it in any of the dry runs, but I have hope. All of these experiments are with stuff you can find at home... Read More

### Q: What is the Leidenfrost effect?

The Leidenfrost effect is observed when a liquid on a hot surface forms a layer of vapor, preventing direct contact and causing the liquid to roll around in droplets.

### Q: How does rubbing a balloon against hair create static electricity?

Rubbing a balloon against hair transfers electrons, causing the balloon to accumulate a static electric charge. This charge attracts or repels other objects, like water, due to the presence of opposite or like charges.

### Q: Why does the can crush when turned over into ice water?

The can crushes because the pressure of the atmosphere becomes greater than the pressure inside the can when it is rapidly cooled. This difference in pressure causes the can to collapse.

### Q: How does carbon dioxide put out the fire when combined with baking soda and vinegar?

Carbon dioxide is denser than air and displaces oxygen, effectively suffocating the fire. When baking soda and vinegar react, they produce carbon dioxide gas, which can quickly extinguish a flame.

### Q: What is the purpose of balancing forks using the principle of center of gravity?

By properly positioning a toothpick through interlocked forks, the center of gravity of the forks can be lowered below the balancing points, allowing them to remain stable and balanced.

### Q: How does surface tension help the water move down the string in the cup experiment?

Surface tension is a cohesive force that allows water molecules to stick together. When water is poured onto the string, the surface tension helps create a continuous flow down the string, overcoming gravity.

### Q: Why does the hard-boiled egg stand up on its end when spun fast?

When the egg is spun fast enough, the centrifugal force acting on it overcomes gravity, causing the egg to stand up on its end.

### Q: How does the non-Newtonian fluid transition between acting like a solid and a liquid?

The non-Newtonian fluid changes its behavior based on the applied force. When force is applied quickly, it behaves like a solid, but when force is applied gradually, it flows like a liquid.

## Summary & Key Takeaways

• Dianna attempts to complete 20 science experiments in just 5 minutes, each experiment using household items and requiring adult supervision.

• The experiments include creating a cloud in your mouth, using static electricity to move water, observing the Leidenfrost effect with water on a hot pan, crushing a can with pressure, popping a closed can with a Sharpie, and more.

• Dianna showcases the use of principles like static electricity, pressure, magnetism, inertia, surface tension, and optical properties in these fun and educational experiments.